package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author: 爱学Java 不想秃头的 KK
 * @date: 2023/7/26 15:57
 * @version: 1.0
 * @Created with IntelliJ IDEA.
 * @Description:
 */
@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setMealService;


    /**
     * 根据id删除分类，删除之前需要判断
     *
     * @param id
     */
    @Override
    public void remove(Long id) {
        // 判断是否关联了菜品，如果已经关联，抛出业务异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(dishLambdaQueryWrapper);
        if(dishCount > 0){
           //已经关联，抛出业务异常
            throw new CustomException("当前分类已关联菜品,无法直接删除!");
        }
        LambdaQueryWrapper<Setmeal> setMealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setMealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int setMealCount = setMealService.count(setMealLambdaQueryWrapper);
        if (setMealCount > 0){
            //已经关联，抛出业务异常
            throw new CustomException("当前分类已关联套餐,无法直接删除!");
        }

        //正常删除
        super.removeById(id);
    }
}
